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Wada S, Ideno H, Nakashima K, Komatsu K, Demura N, Tomonari H, Kimura H, Tachibana M, Nifuji A. The histone H3K9 methyltransferase G9a regulates tendon formation during development. Sci Rep 2024; 14:20771. [PMID: 39237663 PMCID: PMC11377446 DOI: 10.1038/s41598-024-71570-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2024] [Accepted: 08/29/2024] [Indexed: 09/07/2024] Open
Abstract
G9a is a histone methyltransferase that catalyzes the methylation of histone 3 lysine 9 (H3K9), which is involved in the regulation of gene expression. We had previously reported that G9a is expressed in developing tendons in vivo and in vitro and that G9a-deficient tenocytes show impaired proliferation and differentiation in vitro. In this study, we investigated the functions of G9a in tendon development in vivo by using G9a conditional knockout (G9a cKO) mice. We crossed Sox9Cre/+ mice with G9afl/fl mice to generate G9afl/fl; Sox9Cre/+ mice. The G9a cKO mice showed hypoplastic tendon formation at 3 weeks of age. Bromodeoxyuridine labeling on embryonic day 16.5 (E16.5) revealed decreased cell proliferation in the tenocytes of G9a cKO mice. Immunohistochemical analysis revealed decreased expression levels of G9a and its substrate, H3K9me2, in the vertebral tendons of G9a cKO mice. The tendon tissue of the vertebrae and limbs of G9a cKO mice showed reduced expression of a tendon marker, tenomodulin (Tnmd), and col1a1 genes, suggesting that tenocyte differentiation was suppressed. Overexpression of G9a resulted in enhancement of Tnmd and col1a1 expression in tenocytes in vitro. These results suggest that G9a regulates the proliferation and differentiation of tendon progenitor cells during tendon development. Thus, our results suggest that G9a plays an essential role in tendon development.
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Affiliation(s)
- Satoshi Wada
- Department of Pharmacology, School of Dental Medicine, Tsurumi University, Yokohama, Kanagawa, 230-8501, Japan
- Department of Oral and Maxillofacial Surgery, School of Medicine, Kanazawa Medical University, Uchinada, Ishikawa, 920-0293, Japan
- Department of Orthodontics, School of Dental Medicine, Tsurumi University, Yokohama, Kanagawa, 230-8501, Japan
| | - Hisashi Ideno
- Department of Pharmacology, School of Dental Medicine, Tsurumi University, Yokohama, Kanagawa, 230-8501, Japan
| | - Kazuhisa Nakashima
- Department of Pharmacology, School of Dental Medicine, Tsurumi University, Yokohama, Kanagawa, 230-8501, Japan
| | - Koichiro Komatsu
- Department of Pharmacology, School of Dental Medicine, Tsurumi University, Yokohama, Kanagawa, 230-8501, Japan
| | - Noboru Demura
- Department of Oral and Maxillofacial Surgery, School of Medicine, Kanazawa Medical University, Uchinada, Ishikawa, 920-0293, Japan
| | - Hiroshi Tomonari
- Department of Orthodontics, School of Dental Medicine, Tsurumi University, Yokohama, Kanagawa, 230-8501, Japan
| | - Hiroshi Kimura
- Department of Biological Sciences, Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Yokohama, Kanagawa, 226-8501, Japan
| | - Makoto Tachibana
- Laboratory of Epigenome Dynamics, Graduate School of Frontier Biosciences, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Akira Nifuji
- Department of Pharmacology, School of Dental Medicine, Tsurumi University, Yokohama, Kanagawa, 230-8501, Japan.
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2
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Ermakova GV, Meyntser IV, Zaraisky AG, Bayramov AV. Loss of noggin1, a classic embryonic inducer gene, in elasmobranchs. Sci Rep 2024; 14:3805. [PMID: 38360907 PMCID: PMC10869764 DOI: 10.1038/s41598-024-54435-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 02/13/2024] [Indexed: 02/17/2024] Open
Abstract
Secreted proteins of the Noggin family serve as pivotal regulators of early development and cell differentiation in all multicellular animals, including vertebrates. Noggin1 was identified first among all Noggins. Moreover, it was described as the first known embryonic inducer specifically secreted by the Spemann organizer and capable of inducing a secondary body axis when expressed ectopically. In the classical default model of neural induction, Noggin1 is presented as an antagonist of BMP signalling, playing a role as a neural inducer. Additionally, Noggin1 is involved in the dorsalization of embryonic mesoderm and later controls the differentiation of various tissues, including muscles, bones, and neural crest derivatives. Hitherto, noggin1 was found in all studied vertebrates. Here, we report the loss of noggin1 in elasmobranchs (sharks, rays and skates), which is a unique case among vertebrates. noggin2 and noggin4 retained in this group and studied in the embryos of the grey bamboo shark Chiloscyllium griseum revealed similarities in expression patterns and functional properties with their orthologues described in other vertebrates. The loss of noggin1 in elasmobranchs may be associated with histological features of the formation of their unique internal cartilaginous skeleton, although additional research is required to establish functional connections between these events.
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Affiliation(s)
- Galina V Ermakova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997, Russia
| | - Irina V Meyntser
- Moskvarium Center for Oceanography and Marine Biology, Moscow, 129223, Russia
| | - Andrey G Zaraisky
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997, Russia.
- Pirogov Russian National Research Medical University, Moscow, 117997, Russia.
| | - Andrey V Bayramov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, Moscow, 117997, Russia.
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3
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Thomas S, Jaganathan BG. Signaling network regulating osteogenesis in mesenchymal stem cells. J Cell Commun Signal 2022; 16:47-61. [PMID: 34236594 PMCID: PMC8688675 DOI: 10.1007/s12079-021-00635-1] [Citation(s) in RCA: 50] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 06/30/2021] [Indexed: 02/06/2023] Open
Abstract
Osteogenesis is an important developmental event that results in bone formation. Bone forming cells or osteoblasts develop from mesenchymal stem cells (MSCs) through a highly controlled process regulated by several signaling pathways. The osteogenic lineage commitment of MSCs is controlled by cell-cell interactions, paracrine factors, mechanical signals, hormones, and cytokines present in their niche, which activate a plethora of signaling molecules belonging to bone morphogenetic proteins, Wnt, Hedgehog, and Notch signaling. These signaling pathways individually as well as in coordination with other signaling molecules, regulate the osteogenic lineage commitment of MSCs by activating several osteo-lineage specific transcription factors. Here, we discuss the key signaling pathways that regulate osteogenic differentiation of MSCs and the cross-talk between them during osteogenic differentiation. We also discuss how these signaling pathways can be modified for therapy for bone repair and regeneration.
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Affiliation(s)
- Sachin Thomas
- Stem Cells and Cancer Biology Research Group, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India
| | - Bithiah Grace Jaganathan
- Stem Cells and Cancer Biology Research Group, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India.
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4
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Deng J, Wang S, Li N, Chen X, Wang B, Liu H, Zhu L, Cong W, Xiao J, Liu C. Noggin Overexpression Impairs the Development of Muscles, Tendons, and Aponeurosis in Soft Palates by Disrupting BMP-Smad and Shh-Gli1 Signaling. Front Cell Dev Biol 2021; 9:711334. [PMID: 34557486 PMCID: PMC8453081 DOI: 10.3389/fcell.2021.711334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 08/06/2021] [Indexed: 11/13/2022] Open
Abstract
The roles of bone morphogenetic protein (BMP) signaling in palatogenesis were well documented in the developing hard palate; however, little is known about how BMP signaling regulates the development of soft palate. In this study, we overexpressed Noggin transgene via Osr2-cre KI allele to suppress BMP signaling in the developing soft palate. We found that BMP-Smad signaling was detected in the palatal muscles and surrounding mesenchyme. When BMP-Smad signaling was suppressed by the overexpressed Noggin, the soft palatal shelves were reduced in size with the hypoplastic muscles and the extroversive hypophosphatasia (HPP). The downregulated cell proliferation and survival in the Osr2-cre KI ;pMes-Noggin soft palates were suggested to result from the repressed Shh transcription and Gli1 activity, implicating that the BMP-Shh-Gli1 network played a similar role in soft palate development as in the hard palate. The downregulated Sox9, Tenascin-C (TnC), and Col1 expression in Osr2-cre KI ;pMes-Noggin soft palate indicated the impaired differentiation of the aponeurosis and tendons, which was suggested to result in the hypoplasia of palatal muscles. Intriguingly, in the Myf5-cre KI ;pMes-Noggin and the Myf5-cre KI ;Rosa26R-DTA soft palates, the hypoplastic or abrogated muscles affected little the fusion of soft palate. Although the Scx, Tnc, and Co1 transcription was significantly repressed in the tenogenic mesenchyme of the Myf5-cre KI ;pMes-Noggin soft palate, the Sox9 expression, and the Tnc and Col1 transcription in aponeurosis mesenchyme were almost unaffected. It implicated that the fusion of soft palate was controlled by the mesenchymal clues at the tensor veli palatini (TVP) and levator veli palatini (LVP) levels, but by the myogenic components at the palatopharyngeus (PLP) level.
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Affiliation(s)
- Jiamin Deng
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, China.,Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, China
| | - Shangqi Wang
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, China.,Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, China
| | - Nan Li
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, China.,Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, China.,Academician Laboratory of Immune and Oral Development and Regeneration, Dalian Medical University, Dalian, China
| | - Xiaoyan Chen
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, China.,Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, China
| | - Biying Wang
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, China.,Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, China
| | - Han Liu
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, China.,Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, China
| | - Lei Zhu
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, China.,Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, China
| | - Wei Cong
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, China.,Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, China.,Academician Laboratory of Immune and Oral Development and Regeneration, Dalian Medical University, Dalian, China
| | - Jing Xiao
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, China.,Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, China.,Academician Laboratory of Immune and Oral Development and Regeneration, Dalian Medical University, Dalian, China
| | - Chao Liu
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, China.,Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, China.,Academician Laboratory of Immune and Oral Development and Regeneration, Dalian Medical University, Dalian, China
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5
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Culture and differentiation of rabbit intestinal organoids and organoid-derived cell monolayers. Sci Rep 2021; 11:5401. [PMID: 33686141 PMCID: PMC7940483 DOI: 10.1038/s41598-021-84774-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 02/22/2021] [Indexed: 12/14/2022] Open
Abstract
Organoids emulate many aspects of their parental tissue and are therefore used to study pathogen-host interactions and other complex biological processes. Here, we report a robust protocol for the isolation, maintenance and differentiation of rabbit small intestinal organoids and organoid-derived cell monolayers. Our rabbit intestinal spheroid and monolayer cultures grew most efficiently in L-WRN-conditioned medium that contained Wnt, R-spondin and Noggin, and that had been supplemented with ROCK and TGF-β inhibitors. Organoid and monolayer differentiation was initiated by reducing the concentration of the L-WRN-conditioned medium and by adding ROCK and Notch signalling inhibitors. Immunofluorescence staining and RT-qPCR demonstrated that our organoids contained enterocytes, enteroendocrine cells, goblet cells and Paneth cells. Finally, we infected rabbit organoids with Rabbit calicivirus Australia-1, an enterotropic lagovirus that—like many other caliciviruses—does not grow in conventional cell culture. Despite testing various conditions for inoculation, we did not detect any evidence of virus replication, suggesting either that our organoids do not contain suitable host cell types or that additional co-factors are required for a productive infection of rabbit organoids with Rabbit calicivirus Australia-1.
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6
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Yu KE, Alder KD, Morris MT, Munger AM, Lee I, Cahill SV, Kwon HK, Back J, Lee FY. Re-appraising the potential of naringin for natural, novel orthopedic biotherapies. Ther Adv Musculoskelet Dis 2020; 12:1759720X20966135. [PMID: 33343723 PMCID: PMC7727086 DOI: 10.1177/1759720x20966135] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 09/22/2020] [Indexed: 01/03/2023] Open
Abstract
Naringin is a naturally occurring flavonoid found in plants of the Citrus genus that has historically been used in traditional Chinese medical regimens for the treatment of osteoporosis. Naringin modulates signaling through numerous molecular pathways critical to musculoskeletal development, cellular differentiation, and inflammation. Administration of naringin increases in vitro expression of bone morphogenetic proteins (BMPs) and activation of the Wnt/β-catenin and extracellular signal-related kinase (Erk) pathways, thereby promoting osteoblastic proliferation and differentiation from stem cell precursors for bone formation. Naringin also inhibits osteoclastogenesis by both modifying RANK/RANKL interactions and inducing apoptosis in osteoclasts in vitro. In addition, naringin acts on the estrogen receptor in bone to mimic the native bone-preserving effects of estrogen, with few systemic side effects on other estrogen-sensitive tissues. The efficacy of naringin therapy in reducing the osteolysis characteristic of common musculoskeletal pathologies such as osteoporosis, degenerative joint disease, and osteomyelitis, as well as inflammatory conditions affecting bone such as diabetes mellitus, has been extensively demonstrated in vitro and in animal models. Naringin thus represents a naturally abundant, cost-efficient agent whose potential for use in novel musculoskeletal biotherapies warrants re-visiting and further exploration through human studies. Here, we review the cellular mechanisms of action that have been elucidated regarding the action of naringin on bone resident cells and the bone microenvironment, in vivo evidence of naringin’s osteostimulative and chondroprotective properties in the setting of osteolytic bone disease, and current limitations in the development of naringin-containing translational therapies for common musculoskeletal conditions.
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Affiliation(s)
- Kristin E Yu
- Department of Orthopaedics and Rehabilitation, Yale University School of Medicine, 330 Cedar St, TMP 523 PO Box 208071, New Haven, CT 06520-8071, USA
| | - Kareme D Alder
- Department of Orthopædics & Rehabilitation, Yale University, School of Medicine, New Haven, CT, USA
| | - Montana T Morris
- Department of Orthopædics & Rehabilitation, Yale University, School of Medicine, New Haven, CT, USA
| | - Alana M Munger
- Department of Orthopædics & Rehabilitation, Yale University, School of Medicine, New Haven, CT, USA
| | - Inkyu Lee
- Department of Orthopædics & Rehabilitation, Yale University, School of Medicine, New Haven, CT, USA; Department of Life Science, Chung-Ang University, Seoul, Republic of Korea
| | - Sean V Cahill
- Department of Orthopædics & Rehabilitation, Yale University, School of Medicine, New Haven, CT, USA
| | - Hyuk-Kwon Kwon
- Department of Orthopædics & Rehabilitation, Yale University, School of Medicine, New Haven, CT, USA
| | - JungHo Back
- Department of Orthopædics & Rehabilitation, Yale University, School of Medicine, New Haven, CT, USA
| | - Francis Y Lee
- Department of Orthopædics & Rehabilitation, Yale University, School of Medicine, New Haven, CT, USA
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7
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Systems biology analysis of osteogenic differentiation behavior by canine mesenchymal stem cells derived from bone marrow and dental pulp. Sci Rep 2020; 10:20703. [PMID: 33244029 PMCID: PMC7692528 DOI: 10.1038/s41598-020-77656-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2020] [Accepted: 11/13/2020] [Indexed: 12/20/2022] Open
Abstract
Utilization of canine mesenchymal stem cells (cMSCs) for regenerating incorrigible bone diseases has been introduced. However, cMSCs harvested from different sources showed distinct osteogenicity. To clarify this, comparative proteomics-based systems biology analysis was used to analyze osteogenic differentiation behavior by cMSCs harvested from bone marrow and dental pulp. The results illustrated that canine dental pulp stem cells (cDPSCs) contained superior osteogenicity comparing with canine bone marrow-derived MSCs (cBM-MSCs) regarding alkaline phosphatase activity, matrix mineralization, and osteogenic marker expression. Global analyses by proteomics platform showed distinct protein clustering and expression pattern upon an in vitro osteogenic induction between them. Database annotation using Reactome and DAVID revealed contrast and unique expression profile of osteogenesis-related proteins, particularly on signaling pathways, cellular components and processes, and cellular metabolisms. Functional assay and hierarchical clustering for tracking protein dynamic change confirmed that cBM-MSCs required the presences of Wnt, transforming growth factor (TGF)-beta, and bone-morphogenetic protein (BMP) signaling, while cDPSCs mainly relied on BMP signaling presentation during osteogenic differentiation in vitro. Therefore, these findings illustrated the comprehensive data regarding an in vitro osteogenic differentiation behavior by cBM-MSCs and cDPSCs which is crucial for further mechanism study and the establishment of cMSC-based bone tissue engineering (BTE) for veterinary practice.
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8
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Li N, Liu J, Liu H, Wang S, Hu P, Zhou H, Xiao J, Liu C. Altered BMP-Smad4 signaling causes complete cleft palate by disturbing osteogenesis in palatal mesenchyme. J Mol Histol 2020; 52:45-61. [PMID: 33159638 DOI: 10.1007/s10735-020-09922-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Accepted: 10/23/2020] [Indexed: 01/24/2023]
Abstract
As the major receptor mediated BMP signaling in craniofacial development, Bmpr1a expression was detected in the anterior palatal shelves from E13.5 and the posterior palatal shelves from E14.5. However, inactivating BMP receptor in the mesenchyme only leads to anterior cleft palate or submucous cleft palate. The role of BMP signaling in posterior palatal mesenchyme and palatal osteogenesis is still unknown. In this study, a secreted BMP antagonist, Noggin was over-expressed by Osr2-creKI to suppress BMP signaling intensively in mouse palatal mesenchyme, which made the newborn mouse displaying complete cleft palate, a phenotype much severer than the anterior or submucous cleft palate. Immunohistochemical analysis indicated that in the anterior and posterior palatal mesenchyme, the canonical BMP-Smad4 signaling was dramatically down-regulated, while the non-canonical BMP signaling pathways were altered little. Although cell proliferation was reduced only in the anterior palatal mesenchyme, the osteogenic condensation and Osterix distribution were remarkably repressed in the posterior palatal mesenchyme by Noggin over-expression. These findings suggested that BMP-Smad4 signaling was essential for the cell proliferation in the anterior palatal mesenchyme, and for the osteogenesis in the posterior palatal mesenchyme. Interestingly, the constitutive activation of Bmpr1a in palatal mesenchyme also caused the complete cleft palate, in which the enhanced BMP-Smad4 signaling resulted in the premature osteogenic differentiation in palatal mesenchyme. Moreover, neither the Noggin over-expression nor Bmpr1a activation disrupted the elevation of palatal shelves. Our study not only suggested that BMP signaling played the differential roles in the anterior and posterior palatal mesenchyme, but also indicated that BMP-Smad4 signaling was required to be finely tuned for the osteogenesis of palatal mesenchyme.
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Affiliation(s)
- Nan Li
- Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, 116044, China
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, 116044, China
| | - Jing Liu
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, 116044, China
- Medical Department of Dandong Stomatological Hospital, Dandong, 118002, China
| | - Han Liu
- Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, 116044, China
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, 116044, China
| | - Shangqi Wang
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, 116044, China
| | - Ping Hu
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, 116044, China
| | - Hailing Zhou
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, 116044, China
| | - Jing Xiao
- Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, 116044, China
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, 116044, China
| | - Chao Liu
- Dalian Key Laboratory of Basic Research in Oral Medicine, School of Stomatology, Dalian Medical University, Dalian, 116044, China.
- Department of Oral Pathology, School of Stomatology, Dalian Medical University, Dalian, 116044, China.
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9
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Ideno H, Nakashima K, Komatsu K, Araki R, Abe M, Arai Y, Kimura H, Shinkai Y, Tachibana M, Nifuji A. G9a is involved in the regulation of cranial bone formation through activation of Runx2 function during development. Bone 2020; 137:115332. [PMID: 32344102 DOI: 10.1016/j.bone.2020.115332] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 03/19/2020] [Accepted: 03/24/2020] [Indexed: 11/28/2022]
Abstract
The methyltransferase G9a was originally isolated as a histone methyltransferase that catalyzes the methylation of histone 3 lysine 9 (H3K9) to a dimethylated state (H3K9me2). Recent studies have revealed that G9a has multiple functions in various cells, including osteoblasts. Here, we investigated G9a function during cranial bone formation. Crossing Sox9-cre with G9aflox/flox (fl/fl) mice generated conditional knockout mice lacking G9a expression in Sox9-positive neural crest-derived bone cells. Sox9-Cre/G9afl/fl mice showed severe hypo-mineralization of cranial vault bones, including defects in nasal, frontal, and parietal bones with opened fontanelles. Cell proliferation was inhibited in G9a-deleted calvarial bone tissues. Expression levels of bone marker genes, i.e., alkaline phosphatase and osteocalcin, were suppressed, whereas Runx2 expression was not significantly decreased in those tissues. In vitro experiments using G9a-deleted calvarial osteoblasts showed decreased cell proliferation after G9a deletion. In G9a-deleted osteoblasts, expression levels of fibroblast growth factor receptors and several cyclins were suppressed. Moreover, the expression of bone marker genes was decreased, whereas Runx2 expression was not altered by G9a deletion in vitro. G9a enhanced the transcriptional activity of Runx2, whereas siRNA targeting G9a inhibited the transcriptional activity of Runx2 in C3H10T1/2 mesenchymal cells. We confirmed the direct association of endogenous Runx2 with G9a. Chromatin immunoprecipitation experiments showed that G9a bound to Runx2-target regions in promoters in primary osteoblasts. Furthermore, Runx2 binding to the osteocalcin promoter was abrogated in G9-deleted osteoblasts. These results suggest that G9a regulates proliferation and differentiation of cranial bone cells through binding to and activating Runx2.
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Affiliation(s)
- Hisashi Ideno
- Department of Pharmacology, Tsurumi University School of Dental Medicine, Kanagawa 230-8501, Japan; Department of Basic Medical Sciences for Radiation Damages, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba 263-8555, Japan
| | - Kazuhisa Nakashima
- Department of Pharmacology, Tsurumi University School of Dental Medicine, Kanagawa 230-8501, Japan
| | - Koichiro Komatsu
- Department of Pharmacology, Tsurumi University School of Dental Medicine, Kanagawa 230-8501, Japan
| | - Ryoko Araki
- Department of Basic Medical Sciences for Radiation Damages, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba 263-8555, Japan
| | - Masumi Abe
- Department of Basic Medical Sciences for Radiation Damages, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba 263-8555, Japan
| | - Yoshinori Arai
- Nihon University School of Dentistry, Tokyo 101-8310, Japan
| | - Hiroshi Kimura
- Department of Biological Sciences, Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Kanagawa 226-8501, Japan
| | - Yoichi Shinkai
- Cellular Memory Laboratory, RIKEN, Wako 351-0198, Saitama, Japan
| | - Makoto Tachibana
- Laboratory of Epigenome Dynamics, Graduate School of Frontier Biosciences, Osaka University, Suita, Osaka 565-0871, Japan
| | - Akira Nifuji
- Department of Pharmacology, Tsurumi University School of Dental Medicine, Kanagawa 230-8501, Japan; Department of Basic Medical Sciences for Radiation Damages, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba 263-8555, Japan.
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10
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Essential roles of G9a in cell proliferation and differentiation during tooth development. Exp Cell Res 2017; 357:202-210. [DOI: 10.1016/j.yexcr.2017.05.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Revised: 05/12/2017] [Accepted: 05/16/2017] [Indexed: 11/19/2022]
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11
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Etoc F, Metzger J, Ruzo A, Kirst C, Yoney A, Ozair MZ, Brivanlou AH, Siggia ED. A Balance between Secreted Inhibitors and Edge Sensing Controls Gastruloid Self-Organization. Dev Cell 2016; 39:302-315. [PMID: 27746044 DOI: 10.1016/j.devcel.2016.09.016] [Citation(s) in RCA: 224] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 08/17/2016] [Accepted: 09/15/2016] [Indexed: 10/20/2022]
Abstract
The earliest aspects of human embryogenesis remain mysterious. To model patterning events in the human embryo, we used colonies of human embryonic stem cells (hESCs) grown on micropatterned substrate and differentiated with BMP4. These gastruloids recapitulate the embryonic arrangement of the mammalian germ layers and provide an assay to assess the structural and signaling mechanisms patterning the human gastrula. Structurally, high-density hESCs localize their receptors to transforming growth factor β at their lateral side in the center of the colony while maintaining apical localization of receptors at the edge. This relocalization insulates cells at the center from apically applied ligands while maintaining response to basally presented ones. In addition, BMP4 directly induces the expression of its own inhibitor, NOGGIN, generating a reaction-diffusion mechanism that underlies patterning. We develop a quantitative model that integrates edge sensing and inhibitors to predict human fate positioning in gastruloids and, potentially, the human embryo.
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Affiliation(s)
- Fred Etoc
- Center for Studies in Physics and Biology, The Rockefeller University, New York, NY 10065, USA; Laboratory of Molecular Vertebrate Embryology, The Rockefeller University, New York, NY 10065, USA
| | - Jakob Metzger
- Center for Studies in Physics and Biology, The Rockefeller University, New York, NY 10065, USA; Laboratory of Molecular Vertebrate Embryology, The Rockefeller University, New York, NY 10065, USA
| | - Albert Ruzo
- Laboratory of Molecular Vertebrate Embryology, The Rockefeller University, New York, NY 10065, USA
| | - Christoph Kirst
- Center for Studies in Physics and Biology, The Rockefeller University, New York, NY 10065, USA
| | - Anna Yoney
- Center for Studies in Physics and Biology, The Rockefeller University, New York, NY 10065, USA; Laboratory of Molecular Vertebrate Embryology, The Rockefeller University, New York, NY 10065, USA
| | - M Zeeshan Ozair
- Laboratory of Molecular Vertebrate Embryology, The Rockefeller University, New York, NY 10065, USA
| | - Ali H Brivanlou
- Laboratory of Molecular Vertebrate Embryology, The Rockefeller University, New York, NY 10065, USA.
| | - Eric D Siggia
- Center for Studies in Physics and Biology, The Rockefeller University, New York, NY 10065, USA.
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12
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Félix LM, Serafim C, Valentim AM, Antunes LM, Campos S, Matos M, Coimbra AM. Embryonic Stage-Dependent Teratogenicity of Ketamine in Zebrafish (Danio rerio). Chem Res Toxicol 2016; 29:1298-309. [DOI: 10.1021/acs.chemrestox.6b00122] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Luís M. Félix
- Centre
for the Research and Technology of Agro-Environmental and Biological
Sciences (CITAB), University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal
- Laboratory
Animal Science (LAS), Institute for Molecular and Cell Biology (IBMC), University of Porto (UP), Porto, Portugal
- Institute
for Research and Innovation in Health (i3S), University of Porto (UP), Porto, Portugal
| | - Cindy Serafim
- Life
Sciences and Environment School (ECVA), University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal
| | - Ana M. Valentim
- Centre
for the Research and Technology of Agro-Environmental and Biological
Sciences (CITAB), University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal
- Laboratory
Animal Science (LAS), Institute for Molecular and Cell Biology (IBMC), University of Porto (UP), Porto, Portugal
- Institute
for Research and Innovation in Health (i3S), University of Porto (UP), Porto, Portugal
| | - Luís M. Antunes
- Centre
for the Research and Technology of Agro-Environmental and Biological
Sciences (CITAB), University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal
- Laboratory
Animal Science (LAS), Institute for Molecular and Cell Biology (IBMC), University of Porto (UP), Porto, Portugal
- Institute
for Research and Innovation in Health (i3S), University of Porto (UP), Porto, Portugal
- School
of Agrarian and Veterinary Sciences (ECAV), University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal
| | - Sónia Campos
- Centre
for the Research and Technology of Agro-Environmental and Biological
Sciences (CITAB), University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal
- Laboratory
Animal Science (LAS), Institute for Molecular and Cell Biology (IBMC), University of Porto (UP), Porto, Portugal
- Institute
for Research and Innovation in Health (i3S), University of Porto (UP), Porto, Portugal
| | - Manuela Matos
- Biosystems & Integrative Sciences Institute (BioISI), Faculty of Sciences, University of Lisboa, Lisboa, Portugal
- Department
of Genetics and Biotechnology (DGB), University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal
| | - Ana M. Coimbra
- Centre
for the Research and Technology of Agro-Environmental and Biological
Sciences (CITAB), University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal
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13
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Wada S, Ideno H, Shimada A, Kamiunten T, Nakamura Y, Nakashima K, Kimura H, Shinkai Y, Tachibana M, Nifuji A. H3K9MTase G9a is essential for the differentiation and growth of tenocytes in vitro. Histochem Cell Biol 2015; 144:13-20. [PMID: 25812847 DOI: 10.1007/s00418-015-1318-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/17/2015] [Indexed: 10/23/2022]
Abstract
Cell differentiation is controlled by specific transcription factors. The functions and expression levels of these transcription factors are regulated by epigenetic modifications, such as histone modifications and cytosine methylation of the genome. In tendon tissue, tendon-specific transcription factors have been shown to play functional roles in the regulation of tenocyte differentiation. However, the effects of epigenetic modifications on gene expression and differentiation in tenocytes are unclear. In this study, we investigated the epigenetic regulation of tenocyte differentiation, focusing on the enzymes mediating histone 3 lysine 9 (H3K9) methylation. In primary mouse tenocytes, six H3K9 methyltransferase (H3K9MTase) genes, i.e., G9a, G9a-like protein (GLP), PR domain zinc finger protein 2 (PRDM2), SUV39H1, SUV39H2, and SETDB1/ESET were all expressed, with increased mRNA levels observed during tenocyte differentiation. In mouse embryos, G9a and Prdm2 mRNAs were expressed in tenocyte precursor cells, which were overlapped with or were adjacent to cells expressing a tenocyte-specific marker, tenomodulin. Using tenocytes isolated from G9a-flox/flox mice, we deleted G9a by infecting the cells with Cre-expressing adenoviruses. Proliferation of G9a-null tenocytes was significantly decreased compared with that of control cells infected with GFP-expressing adenoviruses. Moreover, the expression levels of tendon transcription factors gene, i.e., Scleraxis (Scx), Mohawk (Mkx), Egr1, Six1, and Six2 were all suppressed in G9a-null tenocytes. The tendon-related genes Col1a1, tenomodulin, and periostin were also downregulated. Consistent with this, Western blot analysis showed that tenomodulin protein expression was significantly suppressed by G9a deletion. These results suggested that expression of the H3K9MTase G9a was essential for the differentiation and growth of tenocytes and that H3K9MTases may play important roles in tendinogenesis.
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Affiliation(s)
- Satoshi Wada
- Department of Pharmacology, Tsurumi University School of Dental Medicine, 2-1-3 Tsurumi, Tsurumi-ku, Yokohama, 230-8501, Japan
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14
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Kamiunten T, Ideno H, Shimada A, Nakamura Y, Kimura H, Nakashima K, Nifuji A. Coordinated expression of H3K9 histone methyltransferases during tooth development in mice. Histochem Cell Biol 2014; 143:259-66. [DOI: 10.1007/s00418-014-1284-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/29/2014] [Indexed: 12/17/2022]
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15
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Matsui M, Klingensmith J. Multiple tissue-specific requirements for the BMP antagonist Noggin in development of the mammalian craniofacial skeleton. Dev Biol 2014; 392:168-81. [PMID: 24949938 DOI: 10.1016/j.ydbio.2014.06.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Revised: 06/06/2014] [Accepted: 06/07/2014] [Indexed: 01/01/2023]
Abstract
Proper morphogenesis is essential for both form and function of the mammalian craniofacial skeleton, which consists of more than twenty small cartilages and bones. Skeletal elements that support the oral cavity are derived from cranial neural crest cells (NCCs) that develop in the maxillary and mandibular buds of pharyngeal arch 1 (PA1). Bone Morphogenetic Protein (BMP) signaling has been implicated in most aspects of craniofacial skeletogenesis, including PA1 development. However, the roles of the BMP antagonist Noggin in formation of the craniofacial skeleton remain unclear, in part because of its multiple domains of expression during formative stages. Here we used a tissue-specific gene ablation approach to assess roles of Noggin (Nog) in two different tissue domains potentially relevant to mandibular and maxillary development. We found that the axial midline domain of Nog expression is critical to promote PA1 development in early stages, necessary for adequate outgrowth of the mandibular bud. Subsequently, Nog expression in NCCs regulates craniofacial cartilage and bone formation. Mice lacking Nog in NCCs have an enlarged mandible that results from increased cell proliferation in and around Meckel׳s cartilage. These mutants also show complete secondary cleft palate, most likely due to inhibition of posterior palatal shelf elevation by disrupted morphology of the developing skull base. Our findings demonstrate multiple roles of Noggin in different domains for craniofacial skeletogenesis, and suggest an indirect mechanism for secondary cleft palate in Nog mutants that may be relevant to human cleft palate as well.
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Affiliation(s)
- Maiko Matsui
- Department of Cell Biology, Duke University Medical Center, Durham NC27710, USA.
| | - John Klingensmith
- Department of Cell Biology, Duke University Medical Center, Durham NC27710, USA.
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16
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Mausner-Fainberg K, Urshansky N, Regev K, Auriel E, Karni A. Elevated and dysregulated bone morphogenic proteins in immune cells of patients with relapsing-remitting multiple sclerosis. J Neuroimmunol 2013; 264:91-9. [PMID: 24080309 DOI: 10.1016/j.jneuroim.2013.09.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Revised: 08/31/2013] [Accepted: 09/09/2013] [Indexed: 11/25/2022]
Abstract
The abundance of neural stem cells (NSCs) in multiple sclerosis (MS) lesions with extensive astrogliosis suggests that fate factors of NSCs, such as the bone morphogenic protein (BMP) signaling maybe defective in MS. We found an elevated mRNA expression and protein secretion of BMP-2,4,5 but not of BMP-7. This was primarily in T cells. Cell stimulation with anti-CD3/CD28 antibodies or with IFN-γ induced expression of BMP-2,4,5 mRNA in untreated RR-MS patients, indicating that proinflammatory processes in MS may play a role in the BMP-2,4,5 productions in T cells. These results contribute to the understanding of the negligible extent of neurogenesis and oligodendrogenesis with extensive astrogliogenesis and the failure of adequate tissue repair in MS lesions.
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Affiliation(s)
- Karin Mausner-Fainberg
- Neuroimmunology Laboratory, Department of Neurology, Tel Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
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17
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Hu X, Wang Y, He F, Li L, Zheng Y, Zhang Y, Chen YP. Noggin is required for early development of murine upper incisors. J Dent Res 2012; 91:394-400. [PMID: 22302143 DOI: 10.1177/0022034511435939] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
BMP signaling plays crucial roles in the development of many organs, including the tooth. Equally important is BMP signaling homeostasis, as demonstrated by multiple organ defects in mice lacking the extracellular BMP antagonist Noggin. Here, we show that Noggin is initially expressed in the maxillary mesenchyme adjunct to the upper incisor at the initiation stage, and then in the developing teeth, including incisors and molars, from the bud stage. Noggin mutants develop normal molars and mandibular incisors, but form a single, medially located upper incisor that is arrested at the late bud stage. Histological and molecular marker analyses demonstrated that two distinct upper incisor placodes initiate independently at E11.5, but begin to fuse at E12.5, coupling with elevated cell proliferation rates in the developing tooth germs. We further found that Chordin and Gremlin, two other BMP antagonists, are co-expressed with Noggin in the developing lower incisor and molar teeth. These observations indicate the importance of BMP signaling homeostasis, and suggest a functional redundancy between BMP antagonists during tooth development.
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Affiliation(s)
- X Hu
- Fujian Key Laboratory of Developmental and Neuro Biology, College of Life Science, Fujian Normal University, Fuzhou, Fujian Province, P.R. China
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18
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Park J, Zhang JJR, Moro A, Kushida M, Wegner M, Kim PCW. Regulation of Sox9 by Sonic Hedgehog (Shh) is essential for patterning and formation of tracheal cartilage. Dev Dyn 2010; 239:514-26. [PMID: 20034104 DOI: 10.1002/dvdy.22192] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
We report that Sonic Hedgehog (Shh) regulates both formation and patterning of tracheal cartilage by controlling the expression pattern and level of the chondrogenic gene, Sox9. In Shh(-/-) tracheo-esophageal tubes, Sox9 expression is transient and not restricted ventrally to the site of chondrogenesis, and is absent at the time of chondrogenesis, resulting in the failure of tracheal cartilage formation. Inhibition of Hedgehog signalling with cyclopamine in tracheal cultures prevents tracheal cartilage formation, while treatment of Shh(-/-) tracheal explant with exogenous Shh peptide rescues cartilage formation. Both exogenous Bmp4 and Noggin rescue cartilage phenotype in Shh(-/-) tracheal culture, while promoting excessive cartilage development in wild-type trachea through induction of Sox9 expression. The ventral and segmented expression of Sox9 in tracheal primordia under Shh modulated by Bmp4 and Noggin thus determine where and when tracheal cartilage develops. These results indicate that Shh signalling is a critical determinant in tracheal cartilage development.
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Affiliation(s)
- Jinhyung Park
- Department of Surgery, Hospital for Sick Children, Toronto, Canada.
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Nifuji A, Ideno H, Ohyama Y, Takanabe R, Araki R, Abe M, Noda M, Shibuya H. Nemo-like kinase (NLK) expression in osteoblastic cells and suppression of osteoblastic differentiation. Exp Cell Res 2010; 316:1127-36. [PMID: 20116374 DOI: 10.1016/j.yexcr.2010.01.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2009] [Revised: 01/19/2010] [Accepted: 01/21/2010] [Indexed: 12/22/2022]
Abstract
Mitogen-activated protein kinases (MAPKs) regulate proliferation and differentiation in osteoblasts. The vertebral homologue of nemo, nemo-like kinase (NLK), is an atypical MAPK that targets several signaling components, including the T-cell factor/lymphoid enhancer factor (TCF/Lef1) transcription factor. Recent studies have shown that NLK forms a complex with the histone H3-K9 methyltransferase SETDB1 and suppresses peroxisome proliferator-activated receptor (PPAR)-gamma:: action in the mesenchymal cell line ST2. Here we investigated whether NLK regulates osteoblastic differentiation. We showed that NLK mRNA is expressed in vivo in osteoblasts at embryonic day 18.5 (E18.5) mouse calvariae. By using retrovirus vectors, we performed forced expression of NLK in primary calvarial osteoblasts (pOB cells) and the mesenchymal cell line ST2. Wild-type NLK (NLK-WT) suppressed alkaline phosphatase activity and expression of bone marker genes such as alkaline phosphatase, type I procollagen, runx2, osterix, steopontin and osteocalcin in these cells. NLK-WT also decreased type I collagen protein expression in pOB and ST2 cells. Furthermore, mineralized nodule formation was reduced in pOB cells overexpressing NLK-WT. In contrast, kinase-negative form of NLK (NLK-KN) did not suppress or partially suppress ALP activity and bone marker gene expression in pOB and ST2 cells. NLK-KN did not suppress nodule formation in pOB cells. In addition to forced expression, suppression of endogenous NLK expression by siRNA increased bone marker gene expression in pOB and ST2 cells. Finally, transcriptional activity analysis of gene promoters revealed that NLK-WT suppressed Wnt1 activation of TOP flash promoter and Runx2 activation of the osteocalcin promoter. Taken together, these results suggest that NLK negatively regulates osteoblastic differentiation.
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Affiliation(s)
- Akira Nifuji
- National Institute of Radiological Sciences, Chiba, Japan.
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Nifuji A, Ideno H, Takanabe R, Noda M. Extracellular Modulators Regulate Bone Morphogenic Proteins in Skeletal Tissue. J Oral Biosci 2010. [DOI: 10.1016/s1349-0079(10)80011-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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21
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Seemann P, Brehm A, König J, Reissner C, Stricker S, Kuss P, Haupt J, Renninger S, Nickel J, Sebald W, Groppe JC, Plöger F, Pohl J, Schmidt-von Kegler M, Walther M, Gassner I, Rusu C, Janecke AR, Dathe K, Mundlos S. Mutations in GDF5 reveal a key residue mediating BMP inhibition by NOGGIN. PLoS Genet 2009; 5:e1000747. [PMID: 19956691 PMCID: PMC2776984 DOI: 10.1371/journal.pgen.1000747] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2009] [Accepted: 10/30/2009] [Indexed: 11/18/2022] Open
Abstract
Signaling output of bone morphogenetic proteins (BMPs) is determined by two sets of opposing interactions, one with heterotetrameric complexes of cell surface receptors, the other with secreted antagonists that act as ligand traps. We identified two mutations (N445K,T) in patients with multiple synostosis syndrome (SYM1) in the BMP–related ligand GDF5. Functional studies of both mutants in chicken micromass culture demonstrated a gain of function caused by a resistance to the BMP–inhibitor NOGGIN and an altered signaling effect. Residue N445, situated within overlapping receptor and antagonist interfaces, is highly conserved among the BMP family with the exception of BMP9 and BMP10, in which it is substituted with lysine. Like the mutant GDF5, both BMPs are insensitive to NOGGIN and show a high chondrogenic activity. Ectopic expression of BMP9 or the GDF5 mutants resulted in massive induction of cartilage in an in vivo chick model presumably by bypassing the feedback inhibition imposed by endogenous NOGGIN. Swapping residues at the mutation site alone was not sufficient to render Bmp9 NOG-sensitive; however, successive introduction of two additional substitutions imparted high to total sensitivity on customized variants of Bmp9. In conclusion, we show a new mechanism for abnormal joint development that interferes with a naturally occurring regulatory mechanism of BMP signaling. The development of the human skeleton is regulated by intricate signaling pathways involving secreted molecules that bind to cell surface receptors to elicit a response in the target cell. Bone morphogenetic proteins (BMPs) are an important part of this process. Their signaling capacity is regulated on several levels including the extracellular space where inhibitors such as Noggin prevent BMPs from binding to their cognate receptors. We here describe that specific mutations of a single amino acid in GDF5, a member of the BMP family, cause congenital fusion of joints. Investigating the effect of the mutation in detail, we can show that the mutant GDF5 is no longer inhibited by Noggin, thus providing a functional explanation for the patients' phenotype. Furthermore, we show that the mutated residue (N445) is conserved throughout the BMP family, with the exception of BMP9 and BMP10, that carry the same amino acid at this position as the mutant GDF5. Both are, just as the mutant, resistant to inhibition by Noggin. Variants of BMPs that are insensitive to antagonists may induce bone formation more effectively, providing a source for effective, low-dose therapeutics for clinical applications.
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Affiliation(s)
- Petra Seemann
- Research Group Development and Disease, Max-Planck-Institut für Molekulare Genetik, Berlin, Germany.
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22
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Torihashi S, Hattori T, Hasegawa H, Kurahashi M, Ogaeri T, Fujimoto T. The expression and crucial roles of BMP signaling in development of smooth muscle progenitor cells in the mouse embryonic gut. Differentiation 2009; 77:277-89. [DOI: 10.1016/j.diff.2008.10.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2008] [Revised: 08/25/2008] [Accepted: 08/26/2008] [Indexed: 10/20/2022]
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23
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Ideno H, Takanabe R, Shimada A, Imaizumi K, Araki R, Abe M, Nifuji A. Protein related to DAN and cerberus (PRDC) inhibits osteoblastic differentiation and its suppression promotes osteogenesis in vitro. Exp Cell Res 2009; 315:474-84. [DOI: 10.1016/j.yexcr.2008.11.019] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2008] [Revised: 11/18/2008] [Accepted: 11/23/2008] [Indexed: 10/21/2022]
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24
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Springer ING, Niehoff P, Açil Y, Marget M, Lange A, Warnke PH, Pielenz H, Roldán JC, Wiltfang J. BMP-2 and bFGF in an irradiated bone model. J Craniomaxillofac Surg 2007; 36:210-7. [PMID: 17945502 DOI: 10.1016/j.jcms.2007.09.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
INTRODUCTION Basic fibroblast growth factor (bFGF) is considered to enhance angiogenesis and to support bone formation in the presence of vital bone cells. Bone morphogenetic protein-2 (rhBMP-2) is known to induce bone formation. The aim of this study was to analyze the effect of bFGF and rhBMP-2 in the irradiated mandible. MATERIAL AND METHODS The right mandibles of 24 rats were irradiated with a single dose of 20 Gy at a high-dose-rate (HDR) after loading machine (bio effective equivalent dose to ca. 45 x 2 Gy). After 12 weeks 100 microg rhBMP-2 (n=6 animals, group 1), 100 microg bFGF (n=6 animals, group 2) and 100 microg rhBMP-2 plus 100 microg bFGF (n=6 animals, group 3) were injected along the right mandible (left mandible: no irradiation, no growth factor). Another 6 animals (group 4) remained untreated after the irradiation. After another 7 weeks the specimens were examined by non-decalcified histology. RESULTS Bone apposition of the experimental versus control sides was not statistically significantly different when one of the growth factors was applied alone (rhBMP-2: p=0.917; bFGF: p=0.345). Average bone apposition was significantly decreased on the experimental sides of group 3 (rhBMP-2+bFGF: p=0.046) and group 4 (p=0.008). Average bone densities were unaffected in all settings (for all p>0.1). CONCLUSIONS The application of bFGF and the application of rhBMP-2 alone did result in predictable bone generation in the irradiated mandible with the bone apposition being equal to that of the non-irradiated side. The application of both growth factors together or none at all after irradiation results in significantly reduced bone apposition.
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Affiliation(s)
- Ingo N G Springer
- Department of Oral and Maxillofacial Surgery, University of Kiel, Germany.
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25
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Lehmann K, Seemann P, Silan F, Goecke TO, Irgang S, Kjaer KW, Kjaergaard S, Mahoney MJ, Morlot S, Reissner C, Kerr B, Wilkie AOM, Mundlos S. A new subtype of brachydactyly type B caused by point mutations in the bone morphogenetic protein antagonist NOGGIN. Am J Hum Genet 2007; 81:388-96. [PMID: 17668388 PMCID: PMC1950796 DOI: 10.1086/519697] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2007] [Accepted: 04/26/2007] [Indexed: 01/01/2023] Open
Abstract
Brachydactyly type B (BDB) is characterized by terminal deficiency of fingers and toes, which is caused by heterozygous truncating mutations in the receptor tyrosine kinase-like orphan receptor 2 (ROR2) in the majority of patients. In a subset of ROR2-negative patients with BDB, clinically defined by the additional occurrence of proximal symphalangism and carpal synostosis, we identified six different point mutations (P35A, P35S, A36P, E48K, R167G, and P187S) in the bone morphogenetic protein (BMP) antagonist NOGGIN (NOG). In contrast to previously described loss-of-function mutations in NOG, which are known to cause a range of conditions associated with abnormal joint formation but without BDB, the newly identified BDB mutations do not indicate a major loss of function, as suggested by calculation of free-binding energy of the modeled NOG-GDF5 complex and functional analysis of the micromass culture system. Rather, they presumably alter NOG's ability to bind to BMPs and growth-differentiation factors (GDFs) in a subtle way, thus disturbing the intricate balance of BMP signaling. The combined features observed in this phenotypic subtype of BDB argue for a functional connection between BMP and ROR2 signaling and support previous findings of a modulating effect of ROR2 on the BMP-receptor pathway through the formation of a heteromeric complex of the receptors at the cell surface.
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Affiliation(s)
- K Lehmann
- Institut fur Medizinische Genetik, Universitatsmedizin Berlin Charite, Berlin, Germany, and Regional Genetic Service, Royal Manchester Children's Hospital, UK.
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26
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Springer ING, Warnke PH, Terheyden H, Açil Y, Bülhoff A, Kuchenbecker S, Bolte H, Russo PAJ, Vairaktaris EG, Wiltfang J. Craniectomy and noggin application in an infant model. J Craniomaxillofac Surg 2007; 35:177-84. [PMID: 17582779 DOI: 10.1016/j.jcms.2007.04.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2006] [Accepted: 02/05/2007] [Indexed: 11/25/2022] Open
Abstract
INTRODUCTION Noggin is an antagonist of bone morphogenetic proteins (BMP)-2, -4 and -7. Little data are available regarding its clinical utility. Two hypotheses were put forward: firstly, that spontaneous regeneration of calvarial defects with noggin protein would result in diminished bone volume when compared with calvarial defects not so treated. Secondly, that centrifugal cranial expansion would remain undisturbed whether noggin was applied or not. MATERIAL AND METHODS A unilateral defect of the frontal and parietal bones (2x4cm) was generated by excising the right coronal suture in 2-month-old minipigs (n=10) and in group 1 (n=5) no further intervention was undertaken. In the second group (n=5), a collagen type I tissue fleece and noggin protein (1.05mg/ml) were applied. After 4 months the coronal suture regions of frontal sides were examined in each animal by computed tomography and non-decalcified histology. RESULTS Bony gaps of equivalent size remained in animals of both groups. The differences in bone volumes of the experimental sides of group 1 were not statistically significantly different (p=0.117) when compared with those of group 2. A significant difference in the bone volumes of the experimental versus control (unoperated) sides was found in both group 1 (p=0.043) and group 2 (p=0.043). Internal skull diameters increased by 16.4% in both groups but the physiological centrifugal cranial expansion remained undisturbed. Bone densities of the experimental and control sides of groups 1 and 2 were not statistically significantly different (both p>0.05). CONCLUSIONS The first hypothesis was contradicted: the quantity and quality of spontaneous bone regenerates was not altered by application of noggin protein. The second hypothesis was confirmed: no disruption of subsequent cranial development was seen. It may be that a single application of noggin protein in this study was insufficient. However, it may well be suggested that the continuous supplementation of noggin, for example by adenoviral noggin gene transfer may significantly reduce the quantity of spontaneous bone regeneration in a similar experiment.
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Affiliation(s)
- Ingo N G Springer
- Department of Oral and Maxillofacial Surgery, University of Kiel, Kiel, Germany.
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Foster BL, Popowics TE, Fong HK, Somerman MJ. Advances in defining regulators of cementum development and periodontal regeneration. Curr Top Dev Biol 2007; 78:47-126. [PMID: 17338915 DOI: 10.1016/s0070-2153(06)78003-6] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Substantial advancements have been made in defining the cells and molecular signals that guide tooth crown morphogenesis and development. As a result, very encouraging progress has been made in regenerating crown tissues by using dental stem cells and recombining epithelial and mesenchymal tissues of specific developmental ages. To date, attempts to regenerate a complete tooth, including the critical periodontal tissues of the tooth root, have not been successful. This may be in part due to a lesser degree of understanding of the events leading to the initiation and development of root and periodontal tissues. Controversies still exist regarding the formation of periodontal tissues, including the origins and contributions of cells, the cues that direct root development, and the potential of these factors to direct regeneration of periodontal tissues when they are lost to disease. In recent years, great strides have been made in beginning to identify and characterize factors contributing to formation of the root and surrounding tissues, that is, cementum, periodontal ligament, and alveolar bone. This review focuses on the most exciting and important developments over the last 5 years toward defining the regulators of tooth root and periodontal tissue development, with special focus on cementogenesis and the potential for applying this knowledge toward developing regenerative therapies. Cells, genes, and proteins regulating root development are reviewed in a question-answer format in order to highlight areas of progress as well as areas of remaining uncertainty that warrant further study.
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Affiliation(s)
- Brian L Foster
- Department of Periodontics, School of Dentistry, University of Washington, Seattle, Washington 98195, USA
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Langenfeld EM, Kong Y, Langenfeld J. Bone morphogenetic protein 2 stimulation of tumor growth involves the activation of Smad-1/5. Oncogene 2006; 25:685-92. [PMID: 16247476 DOI: 10.1038/sj.onc.1209110] [Citation(s) in RCA: 101] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Morphogenetic protein 2 (BMP-2) is normally expressed in the embryo promoting the development of several organs. Aberrant expression of BMP-2 occurs in approximately 98% of lung carcinomas, however, its role in regulating tumor growth is poorly understood. We show that BMP-2 induces Id-1 expression in lung cancer cell lines through its activation of Smad-1/5, which is dependent on cell culture conditions. A549 cells in DMEM/5% FCS BMP-2 activated Smad-1/5 and caused a transient increase in proliferation. In serum-free medium, BMP-2 induced significantly less Smad-1/5 activation and Id-1 expression, and produced significant growth inhibition. The affect of BMP-2 on tumor growth in vivo was substantially more significant. Recombinant BMP-2 coinjected with A549 cells, into nude mice increased proliferation and produced an increase in Id-1 expression. Forced expression of BMP-2 in A549 cells significantly enhanced tumor growth in the lungs following intravenous injection but not of subcutaneous tumors. Tumors in the lung were found to have an activated Smad-1/5 and expressed Id-1. Subcutaneous tumors expressed less activated Smad-1/5 and Id-1 than that of controls. Human lung carcinomas were also found to express an activated Smad-1/5 and Id-1. We provide evidence that BMP-2 promotes tumor growth. This paper highlights that cell culture experiments may not reveal the full biological affects of BMP-2, and its activity varies depending of the local environment.
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Affiliation(s)
- E M Langenfeld
- Division of Thoracic Surgery, Department of Surgery, UMDNJ-Robert Wood Johnson Medical School, New Brunswick, NJ 08903-0019, USA
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Abstract
Transforming growth factor-beta (TGF-beta) superfamily members play diverse roles in all aspects of cartilage development and maintenance. It is well established that TGF-betas and bone morphogenetic proteins (BMPs) play distinct roles in the growth plate. This chapter discusses key experiments and experimental approaches that have revealed these roles, and progress toward the identification of previously unsuspected roles. Current understanding of the mechanisms by which different TGF-beta and BMP pathways exert their functions is discussed. Finally attempts to utilize this information to promote cartilage regeneration, and important issues for future research, are outlined.
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Affiliation(s)
- Robert Pogue
- Department of Orthopaedic Surgery, University of California Los Angeles, California 90095, USA
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Dai J, Keller J, Zhang J, Lu Y, Yao Z, Keller ET. Bone morphogenetic protein-6 promotes osteoblastic prostate cancer bone metastases through a dual mechanism. Cancer Res 2005; 65:8274-85. [PMID: 16166304 DOI: 10.1158/0008-5472.can-05-1891] [Citation(s) in RCA: 164] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Prostate cancer frequently metastasizes to bone where it forms osteoblastic lesions through unknown mechanisms. Bone morphogenetic proteins (BMP) are mediators of skeletal formation. Prostate cancer produces a variety of BMPs, including BMP-6. We tested the hypothesis that BMP-6 contributes to prostate cancer-induced osteosclerosis at bone metastatic sites. Prostate cancer cells and clinical tissues produced BMP-6 that increased with aggressiveness of the tumor. Prostate cancer-conditioned medium induced SMAD phosphorylation in the preosteoblast MC3T3 cells, and phosphorylation was diminished by anti-BMP-6 antibody. Prostate cancer-conditioned medium induced mineralization of MC3T3 cells, which was blocked by both the BMP inhibitor noggin and anti-BMP-6. Human fetal bones were implanted in severe combined immunodeficient mice and after 4 weeks, LuCaP 23.1 prostate cancer cells were injected both s.c. and into the bone implants. Anti-BMP-6 or isotype antibody administration was then initiated. Anti-BMP-6 reduced LuCaP 23.1-induced osteoblastic activity, but had no effect on its osteolytic activity. This was associated with increased osteoblast numbers and osteoblast activity based on bone histomorphometric evaluation. As endothelin-1 has been implicated in bone metastases, we measured serum endothelin-1 levels but found they were not different among the treatment groups. In addition to decreased bone production, anti-BMP-6 reduced intraosseous, but not s.c., tumor size. We found that BMP-2, BMP-4, BMP-6, and BMP-7 had no direct effect on prostate cancer cell growth, but BMP-2 and BMP-6 increased the in vitro invasive ability of prostate cancer cell. These data show that prostate cancer promotes osteoblastic activity through BMP-6 and that, in addition to its bone effects, suggest that BMPs promote the ability of the prostate cancer cells to invade the bone microenvironment.
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Affiliation(s)
- Jinlu Dai
- Department of Urology, School of Medicine, University of Michigan, Ann Arbor, Michigan 48109-0940, USA
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31
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Springer ING, Açil Y, Spies C, Jepsen S, Warnke PH, Bolte H, Kuchenbecker S, Russo PAJ, Wiltfang J, Terheyden H. RhBMP-7 improves survival and eruption in a growing tooth avulsion trauma model. Bone 2005; 37:570-7. [PMID: 16043428 DOI: 10.1016/j.bone.2005.04.037] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/15/2005] [Revised: 04/25/2005] [Accepted: 04/29/2005] [Indexed: 11/17/2022]
Abstract
Long-term loss of avulsed and replanted teeth is a frequent clinical problem. Bone morphogenetic protein-7 (BMP 7) induces cementogenesis in periodontitis-associated periodontal ligament (PDL) defects. This study's aim was to assess the utility of rhBMP 7 in a tooth avulsion trauma model in growing individuals. Immature primary incisors of 12 minipigs were extracted. PDL and cementum were removed either partially (group 1: 4 mm2 [n=28 teeth]; group 2: 16 mm2 [n=26 teeth]) or totally (group 3 [n=26 teeth]). 500 microg rhBMP 7/g collagen matrix was applied to the teeth from one side while the corresponding teeth on the contralateral side served as controls (split mouth model). After an experimental period of 4 months, microradiography, fluorescence and light microscopy of nondecalcified sections were performed. All teeth of group 1 survived and all teeth of group 3 were lost, whether rhBMP-7 was applied or not. In group 2, nine out of ten teeth survived when rhBMP-7 was applied and four out of ten teeth were lost when rhBMP-7 was not applied. In the presence of rhBMP-7, eruption of teeth in group 2 was significantly improved (difference [median]: 5 mm, P<0.05, n=6). Even though there was a tendency towards increased deposition rates of cementum under rhBMP-7, this difference was not significant (Wilcoxon: P>0.05, ANOVA: P=0.002; n=6/group). In conclusion, rhBMP-7 improved survival rates and eruption of replanted teeth in growing individuals. No adverse effects were seen. Based on the present results, future clinical trials appear to be warranted.
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Affiliation(s)
- Ingo N G Springer
- Department of Oral and Maxillofacial Surgery, University of Kiel, Arnold-Hellerstr. 16, D-24105 Kiel, Germany.
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Gamer LW, Nove J, Levin M, Rosen V. BMP-3 is a novel inhibitor of both activin and BMP-4 signaling in Xenopus embryos. Dev Biol 2005; 285:156-68. [PMID: 16054124 DOI: 10.1016/j.ydbio.2005.06.012] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2004] [Revised: 06/09/2005] [Accepted: 06/13/2005] [Indexed: 10/25/2022]
Abstract
In Xenopus, the biological effects of BMP-3 oppose those of ventralizing BMPs, but the mechanism for this antagonism remains unclear. Here, we demonstrate that BMP-3 is a dorso-anteriorizing factor in Xenopus embryos that interferes with both activin and BMP signaling. BMP-3 acts by binding to ActRIIB, the common type II receptor for these proteins. Once BMP-3 binds to ActRIIB, it cannot be competed off by excess ligand making a receptor complex that is unable to activate R-Smads and transduce signal. Consistent with a model where BMP-3 interferes with activin and BMPs through a shared receptor, we show that overexpression of BMP-3 can only be rescued by co-injection of xActRIIB. Our results identify BMP-3 as a novel antagonist of both activin and BMPs and uncover how some of the diverse developmental processes that are regulated by both activin and BMP signaling can be modulated during embryogenesis.
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Affiliation(s)
- Laura W Gamer
- Department of Oral and Developmental Biology, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA.
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33
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Peng H, Usas A, Hannallah D, Olshanski A, Cooper GM, Huard J. Noggin Improves Bone Healing Elicited by Muscle Stem Cells Expressing Inducible BMP4. Mol Ther 2005; 12:239-46. [PMID: 16043095 DOI: 10.1016/j.ymthe.2005.02.027] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2004] [Revised: 02/01/2005] [Accepted: 02/05/2005] [Indexed: 10/25/2022] Open
Abstract
The aim of this study was to test the hypothesis that a specific antagonist may enhance the efficacy of its corresponding growth factor in a regulated tissue engineering strategy. Our prior research has led to the development of a retroviral vector that enables optimal regulated bone morphogenetic protein 4 (BMP4) expression in vitro and regulated bone formation in vivo with transduced muscle stem cells. However, when implanted in critical-sized calvarial defects, these cells led to residual bone formation without induction or bone overgrowth with induction, even at reduced cell doses. We thus co-implanted the aforementioned cells with stem cells engineered to express Noggin, a specific BMP antagonist. This approach, while preserving our ability to regulate bone regeneration closely, prevented both the basal level bone regeneration and the bone overgrowth and, more importantly, led to the regeneration of bone that more closely resembled normal bone. We believe that this regulatable tissue engineering strategy, enhanced by utilizing a specific antagonist, constitutes a new paradigm for tissue engineering and regenerative medicine.
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Affiliation(s)
- Hairong Peng
- Growth and Development Laboratory, Children's Hospital of Pittsburgh, Pittsburgh, PA 15213, USA
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Sanchez CP, He YZ. Daily or intermittent calcitriol administration during growth hormone therapy in rats with renal failure and advanced secondary hyperparathyroidism. J Am Soc Nephrol 2005; 16:929-38. [PMID: 15728789 DOI: 10.1681/asn.2003100878] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Growth hormone (GH) improves growth in children with chronic renal failure. The response to GH may be affected by the degree of secondary hyperparathyroidism and concurrent treatment with vitamin D. Forty-six rats underwent 5/6 nephrectomy (Nx) and were given a high-phosphorus diet (Nx-Phos) to induce advanced secondary hyperparathyroidism and divided into the following groups: (1) Nx-Phos (n = 10) received saline, (2) GH at 10 IU/kg per d (Nx-Phos+GH; n = 9), (3) GH and daily calcitriol (D) at 50 ng/kg per d (Nx-Phos+GH+daily D; n = 8), (4) GH and intermittent D (three times weekly) at 350 ng/kg per wk (Nx-Phos+GH+int D; n = 9), and (5) intact-control (n = 10). Serum parathyroid hormone (PTH) levels were elevated in Nx-Phos, but IGF-I levels did not change with growth hormone. Body length, tibial length, and growth plate width did not increase with either GH or calcitriol. Proliferating cell nuclear antigen staining, PTH/PTHrP receptor, bone morphogenetic protein-7, and fibroblast growth factor receptor-3 expression increased with GH alone or with intermittent calcitriol but were slightly diminished during daily calcitriol administration. GH enhanced IGF-I, IGF binding receptor-3, and GH receptor but declined with daily and intermittent calcitriol. Overall, there was no improvement in body length, tibial length, and growth plate width at the end of GH therapy, but selected markers of chondrocyte proliferation and chondrocyte differentiation increased, although these changes were attenuated by calcitriol. The combination of GH and calcitriol that is frequently used in children with renal failure and secondary hyperparathyroidism require further studies to evaluate the optimal dose and frequency of administration to increase linear growth and prevent bone disease.
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Affiliation(s)
- Cheryl P Sanchez
- Department of Pediatrics, University of Wisconsin Medical School, 3590 MSC/Pediatrics, 1300 University Avenue, Madison, WI 53706, USA.
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Nakamura Y, Wakitani S, Saito N, Takaoka K. Expression profiles of BMP-related molecules induced by BMP-2 or -4 in muscle-derived primary culture cells. J Bone Miner Metab 2005; 23:426-34. [PMID: 16261448 DOI: 10.1007/s00774-005-0624-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2004] [Accepted: 04/19/2005] [Indexed: 10/25/2022]
Abstract
The formation of ectopic bone in muscle following the implantation of decalcified bone matrix led to the search and eventual discovery of bone morphogenetic proteins (BMPs) in bone matrix. The precise sequence of molecular events that underpin the cellular transformation of undifferentiated mesenchymal cells into bone has not been established, and is the subject of this study. Northern and Western blot analyses were used to examine changes in gene expression of cells treated with BMP-2 or -4. The molecules, which included BMP receptors (BMPRs), Noggin (a BMP-specific antagonist), osteocalcin (OC), Smad-4, and MyoD, were examined at messenger RNA (mRNA) and protein levels. The changes in expression of these molecules were followed in mouse muscle-derived primary culture cells, and osteoblastic or nonosteoblastic embryonic cell lines. We show the early up-regulation of BMPR-1A, -2, Noggin, OC, and Smad-4 in muscle-derived primary culture cells in a dose-dependent manner in response to BMP-2 or -4. MyoD expression was not detected after BMP stimulation. The differential expression of these positive and negative regulators of BMP signaling points to a potential regulatory mechanism for bone induction in mesenchymal cells.
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Affiliation(s)
- Yukio Nakamura
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621, Japan
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36
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Sutherland MK, Geoghegan JC, Yu C, Winkler DG, Latham JA. Unique regulation of SOST, the sclerosteosis gene, by BMPs and steroid hormones in human osteoblasts. Bone 2004; 35:448-54. [PMID: 15268896 DOI: 10.1016/j.bone.2004.04.019] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2004] [Revised: 04/14/2004] [Accepted: 04/15/2004] [Indexed: 12/31/2022]
Abstract
SOST, a novel bone morphogenetic protein (BMP) antagonist and negative regulator of bone formation, is expressed in osteogenic cells. Null mutations in the SOST gene are associated with the sclerosteosis phenotype typified by high bone mass. We sought to delineate the pathways involved in the regulation of SOST expression in human osteoblastic cells. We evaluated the effects of bone growth factors and hormones on the RNA levels of SOST and the BMP antagonists, noggin and gremlin. Parathyroid hormone (PTH), transforming growth factor-beta1 (TGF-beta1), fibroblast growth factors 1 and 2 (FGF1, FGF2), and insulin-like growth factor-1 (IGF-1) had negligible effects on SOST expression in human osteoblasts. In comparison, BMPs-2, 4, and 6 induced the message levels of SOST in a time- and dose-dependent manner. The levels of noggin and, to a lesser extent, gremlin were also increased by BMPs. BMP's stimulatory effects on SOST were further enhanced by retinoic acid or 1,25-dihydroxyvitamin D3. In contrast, dexamethasone (DEX) blocked the effects of the BMPs on SOST and gremlin, but not on noggin. Retinoic acid and 1,25-dihydroxyvitamin D3 did not affect the BMP-enhanced expression of gremlin or noggin. The steroids did not affect the endogenous levels of the BMP antagonists. These findings show that the levels of SOST are modulated by BMPs and the interactions of the BMPs with steroid hormones in human osteoblasts. These effects differed markedly from that of noggin or gremlin, suggesting that there is an exquisite regulation of the expressions of BMP antagonists in cells of the osteoblast lineage.
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Affiliation(s)
- May Kung Sutherland
- Department of Gene Function and Target Validation, Celltech R&D, Inc., Bothell, WA 98021, USA
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37
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Winkler DG, Yu C, Geoghegan JC, Ojala EW, Skonier JE, Shpektor D, Sutherland MK, Latham JA. Noggin and Sclerostin Bone Morphogenetic Protein Antagonists Form a Mutually Inhibitory Complex. J Biol Chem 2004; 279:36293-8. [PMID: 15199066 DOI: 10.1074/jbc.m400521200] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Noggin and sclerostin are bone morphogenetic protein (BMP) antagonists that modulate mitogenic activity through sequestering BMPs. Little is known of the interactions among this class of proteins. We show that recombinant sclerostin and noggin bound to each other with high affinity (K(D) = 2.92 nm). This observation has been extended to naturally expressed noggin and sclerostin from the rat osteosarcoma cell line, ROS 17/2.8, supporting a role for the complex in natural systems. The noggin-sclerostin complex was competitive with BMP binding and mutually attenuated the activity of each BMP antagonist. Collectively, the data demonstrate a novel and exquisite paradigm for the regulation of BMP activity through direct neutralization of the BMP and activation by co-localized BMP antagonist expression. The pleiotrophic nature of noggin and sclerostin represents a novel mechanism for the fine-tuning of BMP activity in bone homeostasis.
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Affiliation(s)
- David G Winkler
- Department of Gene Function and Target Validation, Celltech R&D, Inc., Bothell, WA 98021, USA
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38
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Nifuji A, Kellermann O, Noda M. Noggin inhibits chondrogenic but not osteogenic differentiation in mesodermal stem cell line C1 and skeletal cells. Endocrinology 2004; 145:3434-42. [PMID: 15044373 DOI: 10.1210/en.2003-0685] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Osteoblasts and chondroblasts are derived from common mesenchymal progenitors. Although bone morphogenetic protein induces mesenchymal differentiation into both osteogenic and chodrogenic lineage cells in vitro, its inhibitor, Noggin, is expressed exclusively during chondrogenic but not osteogenic differentiation in an embryonal carcinoma-derived mesodermal cell line, C1. We hypothesized that Noggin may regulate cell differentiation in a lineage-specific manner. To test this hypothesis, Noggin was overexpressed using recombinant adenovirus (Ad/Noggin) in mesodermal C1 cells to examine whether Noggin specifically inhibits chondrogenic differentiation. Noggin overexpression by recombinant adenovirus infection reduced Sox9, patched, Ihh, and type II, X, and XI collagen mRNA expression levels in C1 cell aggregates that were induced to differentiate into chondrocyte lineage by culturing in differentiation medium. In contrast, Noggin overexpression did not affect osteogenic differentiation in C1 cells because osteoblast phenotypic markers such as osteocalcin and alkaline phosphatase mRNA levels were not altered. We further examined whether Noggin also differentially affects chondrogenesis and osteogenesis in limb development by using organ cultures of long bone. Ad/Noggin infection into 15.5 d post conception limb skeletal rudiments that were cultured on filter membrane in vitro or on the chorioallantoic membranes in ovo inhibited the levels of chondrogenesis, which were evaluated based on alcian blue staining. These results suggest that Noggin specifically blocks chondrogenic differentiation, rather than osteogenic differentiation, in mesodermal stem cell line C1 and skeletal cells.
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Affiliation(s)
- Akira Nifuji
- Department of Molecular Pharmacology, Medical Research Institute, Tokyo Medical and Dental University, 2-3-10, Kanda-surugadai, Chiyoda-ku, Tokyo 101-0062, Japan
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Keller ET, Brown J. Prostate cancer bone metastases promote both osteolytic and osteoblastic activity. J Cell Biochem 2004; 91:718-29. [PMID: 14991763 DOI: 10.1002/jcb.10662] [Citation(s) in RCA: 191] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Advanced prostate cancer is frequently accompanied by the development of metastasis to bone. In the past, prostate cancer bone metastases were characterized as being osteoblastic (i.e., increasing bone density) based on radiographs. However, emerging evidence suggests that development of prostate cancer bone metastases requires osteoclastic activity in addition to osteoblastic activity. The complexities of how prostate tumor cells influence bone remodeling are just beginning to be elucidated. Prostate cancer cells produce a variety of pro-osteoblastic factors that promote bone mineralization. For example, both bone morphogenetic proteins and endothelin-1 have well recognized pro-osteoblastic activities and are produced by prostate cancer cells. In addition to factors that enhance bone mineralization prostate cancer cells produced factors that promote osteoclast activity. Perhaps the most critical pro-osteoclastogenic factor produced by prostate cancer cells is receptor activator of NFkappaB ligand (RANKL), which has been shown to be required for the development of osteoclasts. Blocking RANKL results in inhibiting prostate cancer-induced osteoclastogenesis and inhibits development and progression of prostate tumor growth in bone. These findings suggest that targeting osteoclast activity may be of therapeutic benefit. However, it remains to be defined how prostate cancer cells synchronize the combination of osteoclastic and osteoblastic activity. We propose that as the bone microenvironment is changed by the developing cancer, this in turn influences the prostate cancer cells' balance between pro-osteoclastic and pro-osteoblastic activity. Accordingly, the determination of how the prostate cancer cells and bone microenvironment crosstalk are important to elucidate how prostate cancer cells modulate bone remodeling.
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Affiliation(s)
- Evan T Keller
- Unit for Laboratory Animal Medicine, School of Medicine, University of Michigan, Ann Arbor, Michigan 48109, USA.
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Hatakeyama Y, Tuan RS, Shum L. Distinct functions of BMP4 and GDF5 in the regulation of chondrogenesis. J Cell Biochem 2004; 91:1204-17. [PMID: 15048875 DOI: 10.1002/jcb.20019] [Citation(s) in RCA: 121] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Bone morphogenetic protein 4 (BMP4) and growth/differentiation factor 5 (GDF5) are closely related protein family members and regulate early cartilage patterning and differentiation. In this study, we compared the functional outcome of their actions systematically at various stages of chondrogenesis in mouse embryonic limb bud mesenchyme grown in micromass cultures. Overall, both growth factors enhanced cartilage growth and differentiation in these cultures. Uniquely, BMP4 not only accelerated the formation and maturation of cartilaginous nodules, but also induced internodular mesenchymal cells to express cartilage differentiation markers. On the other hand, GDF5 increased the number of prechondrogenic mesenchymal cell condensation and cartilaginous nodules, without altering the overall pattern of differentiation. In addition, GDF5 caused a more sustained elevated expression level of Sox9 relative to that associated with BMP4. BMP4 accelerated chondrocyte maturation throughout the cultures and sustained an elevated level of Col10 expression, whereas GDF5 caused a transient increase in Col10 expression. Taken together, we conclude that BMP4 is instructive to chondrogenesis and induces mesenchymal cells toward the chondrogenic lineage. Furthermore, BMP4 accelerates the progression of cartilage differentiation to maturation. GDF5 enhances cartilage formation by promoting chondroprogenitor cell aggregation, and amplifying the responses of cartilage differentiation markers. These differences may serve to fine-tune the normal cartilage differentiation program, and can be exploited for the molecular manipulation in biomimetics.
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Affiliation(s)
- Yuji Hatakeyama
- Cartilage Biology and Orthopaedics Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, National Institutes of Health, U.S. Department of Health and Human Services, Bethesda, Maryland 20892-6402, USA
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Jin QM, Zhao M, Economides AN, Somerman MJ, Giannobile WV. Noggin gene delivery inhibits cementoblast-induced mineralization. Connect Tissue Res 2004; 45:50-9. [PMID: 15203940 PMCID: PMC2613802 DOI: 10.1080/03008200490278142] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Bone morphogenetic proteins (BMPs) are known to promote periodontal tissue regeneration, while noggin inhibits the biological activities of BMP-2, -4, and -7. To investigate the effect of BMPs and noggin gene transfer on cementogenesis, we used cloned murine cementoblasts (OCCM). Cells were transduced using adenoviruses encoding BMP-7 (Ad-BMP-7), noggin devoid of the heparin binding site (Ad-NOGDeltaB2), or a control adenovirus encoding green fluorescent protein (Ad-GFP). Cells were seeded into 3D polymer scaffolds and implanted into SCID mice to determine the in vivo mineral-inducing ability of the cells. Cells transduced with Ad-NOGDeltaB2 at 3 and 6 weeks postimplantation exhibited reduced mineral formation compared with all other groups. Although gene expression of osteocalcin and bone sialoprotein increased after Ad-BMP-7 transduction in vitro, following BMP-7 gene transfer in vivo, transcripts for OCN and BSP were not significantly different from controls, and mineral density was not significantly increased compared with Ad-GFP and NT groups. These results indicate that in mature cementoblast populations, gene transfer of noggin inhibits biomineralization induced by cementoblasts, whereas exogenous BMP has minimal effects on mineralization.
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Affiliation(s)
- Q-M Jin
- Center for Craniofacial Regeneration and Department of Periodontics/Prevention/Geriatrics, School of Dentistry, University of Michigan, Ann Arbor, Michigan 48109-1078, USA
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Nakayama N, Han CYE, Cam L, Lee JI, Pretorius J, Fisher S, Rosenfeld R, Scully S, Nishinakamura R, Duryea D, Van G, Bolon B, Yokota T, Zhang K. A novel chordin-like BMP inhibitor, CHL2, expressed preferentially in chondrocytes of developing cartilage and osteoarthritic joint cartilage. Development 2003; 131:229-40. [PMID: 14660436 DOI: 10.1242/dev.00901] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We have identified a novel chordin-like protein, CHL2, which is structurally most homologous to CHL/neuralin/ventroptin. When injected into Xenopus embryos, CHL2 RNA induced a secondary axis. Recombinant CHL2 protein interacted directly with BMPs in a competitive manner to prevent binding to the type I BMP receptor ectodomain, and inhibited BMP-dependent induction of alkaline phosphatase in C2C12 cells. Thus, CHL2 behaves as a secreted BMP-binding inhibitor. In situ hybridization revealed that CHL2 expression is restricted to chondrocytes of various developing joint cartilage surfaces and connective tissues in reproductive organs. Adult mesenchymal progenitor cells expressed CHL2, and its levels decreased during chondrogenic differentiation. Addition of CHL2 protein to a chondrogenic culture system reduced cartilage matrix deposition. Consistently, CHL2 transcripts were weakly detected in normal adult joint cartilage. However, CHL2 expression was upregulated in middle zone chondrocytes in osteoarthritic joint cartilage (where hypertrophic markers are induced). CHL2 depressed chondrocyte mineralization when added during the hypertrophic differentiation of cultured hyaline cartilage particles. Thus, CHL2 may play negative roles in the (re)generation and maturation of articular chondrocytes in the hyaline cartilage of both developing and degenerated joints.
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Affiliation(s)
- Naoki Nakayama
- Department of Metabolic Disorders, Amgen, One Amgen Center Drive, Thousand Oaks, CA 91320, USA.
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Glaser DL, Economides AN, Wang L, Liu X, Kimble RD, Fandl JP, Wilson JM, Stahl N, Kaplan FS, Shore EM. In vivo somatic cell gene transfer of an engineered Noggin mutein prevents BMP4-induced heterotopic ossification. J Bone Joint Surg Am 2003; 85:2332-42. [PMID: 14668502 DOI: 10.2106/00004623-200312000-00010] [Citation(s) in RCA: 99] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND The formation of the skeleton requires inductive signals that are balanced with their antagonists in a highly regulated negative feedback system. Inappropriate or excessive expression of BMPs (bone morphogenetic proteins) or their antagonists results in genetic disorders affecting the skeleton, such as fibrodysplasia ossificans progressiva. BMP signaling mediated through binding to its receptors is a critical step in the induction of abnormal ossification. Therefore, we hypothesized that engineering more effective inhibitors of this BMP-signaling process may lead to the development of therapies for such conditions. METHODS BMP4-induced heterotopic ossification was used as a model for testing the ability of the BMP antagonist Noggin to block de novo bone formation, either by local or systemic delivery. Since Noggin naturally acts locally, a Noggin mutein, hNOGDeltaB2, was engineered and was shown to circulate systemically, and its ability to block heterotopic ossification was tested in a mouse model with use of adenovirus-mediated somatic cell gene transfer. RESULTS A mouse model of BMP4-induced heterotopic ossification was developed. Local delivery of wild-type NOG inhibited heterotopic ossification, but systemic administration was ineffective. In contrast, systemic delivery of the adenovirus encoding hNOGDeltaB2 resulted in systemic levels that persisted for more than two weeks and were sufficient to block BMP4-induced heterotopic ossification. CONCLUSIONS BMP4-induced heterotopic ossification can be prevented in vivo either by local delivery of wild-type Noggin or after somatic cell gene transfer of a Noggin mutein, hNOGDeltaB2. Furthermore, the data in the present study provide proof of concept that a naturally occurring factor can be engineered for systemic delivery toward a desirable pharmacological outcome. CLINICAL RELEVANCE Blocking bone formation is clinically relevant to disorders of heterotopic ossification in humans, such as fibrodysplasia ossificans progressiva. Furthermore, development of BMP antagonists as therapeutic agents may provide modalities for the treatment of other pathologic conditions that arise from aberrant expression of BMPs and/or from a lack of their antagonists.
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Affiliation(s)
- David L Glaser
- Regeneron Pharmaceuticals, 777 Old Saw Mill River Road, Tarrytown, NY 10591, USA.
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Nakamura Y, Wakitani S, Nakayama J, Wakabayashi S, Horiuchi H, Takaoka K. Temporal and spatial expression profiles of BMP receptors and noggin during BMP-2-induced ectopic bone formation. J Bone Miner Res 2003; 18:1854-62. [PMID: 14584896 DOI: 10.1359/jbmr.2003.18.10.1854] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
UNLABELLED The mechanism of ectopic bone formation has not been clear. After BMP-2 implantation into the back muscles of 198 mice, expression of BMPR-1A, -2, and Noggin was increased during the early phase of the reaction. The results suggest that positive and negative feedback mechanisms modulate ectopic osteogenesis induced by this growth factor. INTRODUCTION The expression of bone morphogenetic protein receptors (BMPRs) and Noggin during ectopic bone formation after implantation of BMP-2 into the back muscles of adult mice was investigated in this study. METHODS One hundred ninety-eight male ddy mice were divided into groups and received either collagen disks containing BMP-2, collagen disks alone, or sham surgery with no disk implantation. Changes in the temporal and spatial expression profiles of BMPRs and Noggin were examined by Northern blotting, in situ hybridization, Western blotting, and immunohistochemistry. RESULTS AND CONCLUSIONS In the BMP group, expression of BMPR-1A, -2, and Noggin mRNA and protein was enhanced 2-4 days after implantation in undifferentiated mesenchymal cells and regenerating muscle fibers located close to the BMP-retaining implants. On day 7, the expression was also observed in cartilage cells, and after day 14, in the osteoblastic cells around bone tissue. The level of expression peaked at day 4 after implantation and persisted at a much lower level during the bone forming process. No significant expression of BMPR-1B was detected at the mRNA and protein levels during the bone-forming reaction. In the BMP free control groups, a mild enhancement of BMPR-2 expression was also noted around the implant, but this was not observed for BMPR-1A, -1B, or Noggin. Upregulated expression of BMPR-1A, -2, and Noggin in undifferentiated mesenchymal cells and regenerating muscle fibers occurs during the early phase of BMP-2-induced bone formation. The coordinate expression of these positive and negative regulators of BMP signaling points to a potential regulatory mechanism for bone induction.
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Affiliation(s)
- Yukio Nakamura
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, Matsumoto, Japan
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45
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Jin QM, Anusaksathien O, Webb SA, Rutherford RB, Giannobile WV. Gene therapy of bone morphogenetic protein for periodontal tissue engineering. J Periodontol 2003; 74:202-13. [PMID: 12666709 PMCID: PMC2680435 DOI: 10.1902/jop.2003.74.2.202] [Citation(s) in RCA: 147] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND The reconstruction of lost periodontal support including bone, ligament, and cementum is a major goal of therapy. Bone morphogenetic proteins (BMPs) have shown much potential in the regeneration of the periodontium. Limitations of BMP administration to periodontal lesions include need for high-dose bolus delivery, BMP transient biological activity, and low bioavailability of factors at the wound site. Gene transfer offers promise as an alternative treatment strategy to deliver BMPs to periodontal tissues. METHODS This study utilized ex vivo BMP-7 gene transfer to stimulate tissue engineering of alveolar bone wounds. Syngeneic dermal fibroblasts (SDFs) were transduced ex vivo with adenoviruses encoding either green fluorescent protein (Ad-GFP or control virus), BMP-7 (Ad-BMP-7), or an antagonist of BMP bioactivity, noggin (Ad-noggin). Transduced cells were seeded onto gelatin carriers and then transplanted to large mandibular alveolar bone defects in a rat wound repair model. RESULTS Ad-noggin treatment tended to inhibit osteogenesis as compared to the control-treated and Ad-BMP-7-treated specimens. The osseous lesions treated by Ad-BMP-7 gene delivery demonstrated rapid chrondrogenesis, with subsequent osteogenesis, cementogenesis and predictable bridging of the periodontal bone defects. CONCLUSION These results demonstrate the first successful evidence of periodontal tissue engineering using ex vivo gene transfer of BMPs and offers a new approach for repairing periodontal defects.
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Affiliation(s)
- Q M Jin
- Center for Craniofacial Regeneration, School of Dentistry, University of Michigan, Ann Arbor, MI 48109-1078, USA
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Chang W, ten Dijke P, Wu DK. BMP pathways are involved in otic capsule formation and epithelial-mesenchymal signaling in the developing chicken inner ear. Dev Biol 2002; 251:380-94. [PMID: 12435365 DOI: 10.1006/dbio.2002.0822] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The vertebrate inner ear consists of a complex labyrinth of epithelial cells that is surrounded by a bony capsule. The molecular mechanisms coordinating the development of the membranous and bony labyrinths are largely unknown. Previously, using avian retrovirus encoding Noggin (RCAS-Noggin) or beads soaked with Noggin protein, we have shown that bone morphogenetic proteins (BMPs) are important for the development of the otic epithelium in the chicken inner ear. Here, using two additional recombinant avian retroviruses, dominant negative and constitutively active forms of BMP receptors IB (BMPRIB), we show that BMPs, possibly acting through BMPRIB, are important for otic capsule formation. We also show that Bmp2 is strongly expressed in the prospective semicircular canals starting from the canal outpouch stage, suggesting that BMP2 plays an important role in canal formation. In addition, by correlating expression patterns of Bmps, their receptors, and localization of phosphorylated R-Smad (phospho R-Smad) immunoreactivity, an indicator of BMP activation, we show that BMPs emanating from the otic epithelium influence chondrogenesis of the otic capsule including the cartilage surrounding the semicircular canals.
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Affiliation(s)
- Weise Chang
- National Institute on Deafness and Other Communications Disorders, National Institutes of Health, Rockville, Maryland 20850, USA
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Balemans W, Van Hul W. Extracellular regulation of BMP signaling in vertebrates: a cocktail of modulators. Dev Biol 2002. [PMID: 12376100 DOI: 10.1006/dbio.2002.0779] [Citation(s) in RCA: 427] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The transforming growth factor-beta (TGF-beta) superfamily contains a variety of growth factors which all share common sequence elements and structural motifs. These proteins are known to exert a wide spectrum of biological responses on a large variety of cell types in both vertebrates and invertebrates. Many of them have important functions during embryonic development in pattern formation and tissue specification, and in adult tissues, they are involved in processes such as wound healing, bone repair, and bone remodeling. The family is divided into two general branches: the BMP/GDF and the TGF-beta/Activin/Nodal branches, whose members have diverse, often complementary effects. It is obvious that an orchestered regulation of different actions of these proteins is necessary for proper functioning. The TGF-beta family members act by binding extracellularly to a complex of serine/threonine kinase receptors, which consequently activate Smad molecules by phosphorylation. These Smads translocate to the nucleus, where they modulate transcription of specific genes. Three levels by which this signaling pathway is regulated could be distinguished. First, a control mechanism exists in the intracellular space, where inhibitory Smads and Smurfs prevent further signaling and activation of target genes. Second, at the membrane site, the pseudoreceptor BAMBI/Nma is able to inhibit further signaling within the cells. Finally, a range of extracellular mediators are identified which modulate the functioning of members of the TGF-beta superfamily. Here, we review the insights in the extracellular regulation of members of the BMP subfamily of secreted growth factors with a major emphasis on vertebrate BMP modulation.
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Affiliation(s)
- Wendy Balemans
- Department of Medical Genetics, University of Antwerp and University Hospital, Antwerp 2610, Belgium
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48
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Ashique AM, Fu K, Richman JM. Endogenous bone morphogenetic proteins regulate outgrowth and epithelial survival during avian lip fusion. Development 2002; 129:4647-60. [PMID: 12223420 DOI: 10.1242/dev.129.19.4647] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Our expression studies of bone morphogenetic proteins (BMPs) and Noggin (a BMP antagonist) in the embryonic chicken face suggested that BMP signals were important for closure of the upper lip or primary palate. We noted that Noggin expression was restricted to the frontonasal mass epithelium but was reduced at the corners of the frontonasal mass (globular processes) just prior to fusion with the adjacent maxillary prominences. We therefore performed gain- and loss-of-function experiments to determine the role of BMPs in lip formation. Noggin treatment led to reduced proliferation and outgrowth of the frontonasal mass and maxillary prominences and ultimately to the deletion of the maxillary and palatine bones. The temporary block in BMP signalling in the mesenchyme also promoted epithelial survival. Noggin treatment also upregulated expression of endogenous BMPs, therefore we investigated whether increasing BMP levels would lead to the same phenotype. A BMP2 bead was implanted into the globular process and a similar phenotype to that produced by Noggin resulted. However, instead of a decrease in proliferation, defects were caused by increased programmed cell death, first in the epithelium and then in the mesenchyme. Programmed cell death was induced primarily in the lateral frontonasal mass with very little cell death medial to the bead. The asymmetric cell death pattern was correlated with a rapid induction of Noggin in the same embryos, with transcripts complementary to the regions with increased cell death. We have demonstrated a requirement for endogenous BMP in the proliferation of facial mesenchyme and that mesenchymal signals promote either survival or thinning of the epithelium. We furthermore demonstrated in vivo that BMP homeostasis is regulated by increasing expression of ligand or antagonist and that such mechanisms may help to protect the embryo from changes in growth factor levels during development or after exposure to teratogens.
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Affiliation(s)
- Amir M Ashique
- Department of Oral Health Sciences, Faculty of Dentistry, The University of British Columbia, Vancouver, BC, Canada
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Shen ZJ, Nakamoto T, Tsuji K, Nifuji A, Miyazono K, Komori T, Hirai H, Noda M. Negative regulation of bone morphogenetic protein/Smad signaling by Cas-interacting zinc finger protein in osteoblasts. J Biol Chem 2002; 277:29840-6. [PMID: 12023967 DOI: 10.1074/jbc.m203157200] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Bone morphogenetic protein (BMP) signaling regulates body axis determination, apoptosis, and differentiation of various types of cells including neuron, gut, and bone cells. However, the molecules involved in such BMP regulation of biological events have not been fully understood. Here, we examined the involvement of Cas-interacting zinc finger protein (CIZ) in the modulation of BMP2-induced osteoblastic cell differentiation. CIZ overexpression in osteoblastic MC3T3E1 cells suppressed BMP2-enhanced expression of alkaline phosphatase, osteocalcin, and type I collagen genes. Upstream analyses revealed that CIZ overexpression also suppressed BMP2-induced enhancement of the mRNA expression of Cbfa1, which is a critical transcription factor for osteoblastic differentiation. BMP-induced Smad1 and Smad5 activation of GCCG-mediated transcription was blocked in the presence of CIZ overexpression. CIZ overexpression alone in the absence of BMP2 moderately enhanced basal levels of Cbfa1 mRNA expression. CIZ overexpression also enhanced 1.8-kb Cbfa1 promoter activity in the absence of BMP2, whereas it suppressed the promoter activity in the presence of BMP2. Finally, CIZ overexpression suppressed the formation of mineralized nodules in osteoblastic cell cultures. These data indicate that CIZ is a novel type inhibitor of BMP/Smad signaling.
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Affiliation(s)
- Zhong-Jian Shen
- Department of Molecular Pharmacology, Medical Research Institute, Tokyo Medical and Dental University, 3-10 Kanda-Sunugadai 2-Chome Chiyoda-ku, Tokyo, 101 Japan
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Stottmann RW, Anderson RM, Klingensmith J. The BMP antagonists Chordin and Noggin have essential but redundant roles in mouse mandibular outgrowth. Dev Biol 2001; 240:457-73. [PMID: 11784076 DOI: 10.1006/dbio.2001.0479] [Citation(s) in RCA: 106] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Here we investigate the roles of the Bone Morphogenetic Protein (BMP) antagonists Chordin and Noggin in development of the mandible, which is derived from the first branchial arch (BA1). Both genes are expressed in the pharynx during early mandibular outgrowth and later in the mandibular process. Mice mutant for either Nog or Chd have only mild mandibular defects; however, pups of the genotype Chd(-/-);Nog(+/-) exhibit a range of mandibular truncation phenotypes, from normal to agnathia. A few embryos homozygous null for both genes survive to late gestation; many are agnathic, though a few have significant mandibular outgrowth. In mandibular explants, ectopic BMP4 rapidly induces expression of both Chd and Nog, consistent with results obtained in vivo with mutant embryos. Previous work has shown that FGF8 is a survival factor for cells populating the mandibular bud. We find that excess BMP4 represses Fgf8 transcription in mandibular explants. Embryos lacking these BMP antagonists often show a strong reduction in Fgf8 expression in the pharyngeal ectoderm, and increased cell death in the mandibular bud. We suggest that the variable mandibular hypoplasia in double mutants involves increased BMP activity downregulating Fgf8 expression in the pharynx, decreasing cell survival during mandibular outgrowth.
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Affiliation(s)
- R W Stottmann
- Department of Cell Biology, Duke University Medical Center, Durham, North Carolina 27710, USA
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